package com.atguigu.gulimall.ware.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.exception.NoStockException;
import com.atguigu.common.mq.StockDetailTo;
import com.atguigu.common.mq.StockLockedTo;
import com.atguigu.common.to.mq.OrderTo;
import com.atguigu.common.utils.R;
import com.atguigu.gulimall.ware.entity.WareOrderTaskDetailEntity;
import com.atguigu.gulimall.ware.entity.WareOrderTaskEntity;
import com.atguigu.gulimall.ware.feign.OrderFeignService;
import com.atguigu.gulimall.ware.feign.ProductFeignService;
import com.atguigu.gulimall.ware.service.WareOrderTaskDetailService;
import com.atguigu.gulimall.ware.service.WareOrderTaskService;
import com.atguigu.gulimall.ware.vo.OrderItemVo;
import com.atguigu.gulimall.ware.vo.OrderVo;
import com.atguigu.gulimall.ware.vo.SkuHasStockVo;
import com.atguigu.gulimall.ware.vo.WareSkuLockVo;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.impl.AMQImpl;
import lombok.Data;
import org.apache.commons.lang.StringUtils;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.ware.dao.WareSkuDao;
import com.atguigu.gulimall.ware.entity.WareSkuEntity;
import com.atguigu.gulimall.ware.service.WareSkuService;
import org.springframework.transaction.annotation.Transactional;

//@RabbitListener(queues = "stock.release.stock.queue")
@Service("wareSkuService")
public class WareSkuServiceImpl extends ServiceImpl<WareSkuDao, WareSkuEntity> implements WareSkuService {
    @Autowired
    WareSkuDao wareSkuDao ;
    @Autowired
    ProductFeignService productFeignService ;
    @Autowired
    RabbitTemplate rabbitTemplate ;
    @Autowired
    WareOrderTaskService orderTaskService ;
    @Autowired
    WareOrderTaskDetailService orderTaskDetailService ;
    @Autowired
    OrderFeignService orderFeignService ;
    private void unLockStock(Long skuId,Long wareId,Integer num,Long taskDetailId){
        //库存解锁
        wareSkuDao.unlockStock(skuId,wareId,num);
        //更新库存工作单的状态
        WareOrderTaskDetailEntity entity = new WareOrderTaskDetailEntity();
        entity.setId(taskDetailId);
        entity.setLockStatus(2);//变为已解锁
        orderTaskDetailService.updateById(entity);
    }
    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        QueryWrapper<WareSkuEntity> queryWrapper = new QueryWrapper<>();
        String skuId = (String) params.get("skuId");
        if(!StringUtils.isEmpty(skuId)){
            queryWrapper.eq("sku_id",skuId);
        }
        String wareId = (String) params.get("wareId");
        if(!StringUtils.isEmpty(wareId)){
            queryWrapper.eq("ware_id",skuId);
        }
        IPage<WareSkuEntity> page = this.page(
                new Query<WareSkuEntity>().getPage(params),queryWrapper

        );

        return new PageUtils(page);
    }

    @Override
    public void addStock(Long skuId, Long wareId, Integer skuNum) {
        List<WareSkuEntity> entities = wareSkuDao.selectList(new QueryWrapper<WareSkuEntity>().eq("sku_id", skuId).eq("ware_id", wareId));
        if(entities.size()==0 || entities == null){
            WareSkuEntity skuEntity = new WareSkuEntity();
            skuEntity.setSkuId(skuId);
            skuEntity.setStock(skuNum);
            skuEntity.setWareId(wareId);
            skuEntity.setStockLocked(0);
            // TODO 远程查询sku的名字，如果失败不需回滚
            try{
                R info = productFeignService.info(skuId);
                Map<String,Object> data = (Map<String, Object>) info.get("skuInfo");
                if(info.getCode() == 0){
                    skuEntity.setSkuName((String) data.get("skuName"));
                }
            }catch (Exception e){

            }


            wareSkuDao.insert(skuEntity) ;
        }else{
            wareSkuDao.addStock(skuId,wareId,skuNum) ;
        }
    }

    @Override
    public List<SkuHasStockVo> getSkuHasStock(List<Long> skuIds) {
        List<SkuHasStockVo> collect = skuIds.stream().map(skuId -> {
            SkuHasStockVo vo = new SkuHasStockVo();
//            查询当前sku的总库存量
            Long count = baseMapper.getSkuStock(skuId);
            vo.setSkuId(skuId);
            vo.setHasStock(count==null?false:count>0);
            return vo;
        }).collect(Collectors.toList());

        return collect;
    }
//为某个订单锁定库存,默认运行时异常都会回滚
    @Transactional
    @Override
    public Boolean orderLockStock(WareSkuLockVo vo) {
        /**
         * 保存库存工作单的详情。追溯
         */
        WareOrderTaskEntity taskEntity = new WareOrderTaskEntity();
        taskEntity.setOrderSn(vo.getOrderSn());
        orderTaskService.save(taskEntity);

        //1按照下单的收货地址，找到一个就近仓库，锁定库存
        //1找到每一个商品在哪个仓库有库存
        List<OrderItemVo> locks = vo.getLocks();
        List<SkuWareHasStock> collect = locks.stream().map(item -> {
            SkuWareHasStock stockVo = new SkuWareHasStock();
            Long skuId = item.getSkuId();
            stockVo.setSkuId(skuId);
            stockVo.setNum(item.getCount());
//            查询这个商品在哪里有库存
            List<Long> wareIds = wareSkuDao.listWareIdHasSkuStock(skuId);
            stockVo.setWareId(wareIds);
            return stockVo;
        }).collect(Collectors.toList());
        //2、锁定库存
        for (SkuWareHasStock hasStock : collect) {
            Boolean skuStocke = false ;
            Long skuId = hasStock.getSkuId();
            List<Long> wareIds = hasStock.getWareId();
            if(wareIds == null || wareIds.size() == 0){
                throw new NoStockException(skuId);
            }
            for (Long wareId : wareIds) {
                Long count = wareSkuDao.lockSkusStock(skuId,wareId,hasStock.getNum());
                if(count==1){
                    skuStocke = true ;
                    //TODO 告诉MQ库存锁定成功
                    WareOrderTaskDetailEntity entity = new WareOrderTaskDetailEntity(null, skuId, null, hasStock.getNum(), taskEntity.getId(), wareId, 1);
                    orderTaskDetailService.save(entity);
//                    rabbitTemplate
                    StockLockedTo lockedTo = new StockLockedTo();
                    lockedTo.setId(taskEntity.getId());
                    StockDetailTo stockDetailTo = new StockDetailTo();
                    BeanUtils.copyProperties(entity,stockDetailTo);
                    lockedTo.setDetail(stockDetailTo);
                    rabbitTemplate.convertAndSend("stock-event-exchange","stock.locked",lockedTo);
                    break;
                }else {
                    //当前仓库锁失败，重试下一个仓库
                }
                if(skuStocke ==false){
                    //当前的商品所有仓库都没有锁住
                    throw new NoStockException(skuId);
                }
            }
        }
        return true;
    }

    @Override
    public void unlockStock(StockLockedTo to) {
            StockDetailTo detail = to.getDetail();
            Long detailId = detail.getId();
            /**
             * 解锁
             * 1 查询这个数据库关于这个订单的锁定库存信息
             * 没有：库存锁定失败库存回滚了，这种情况无需解锁
             * 有：证明库存锁定成功
             *      解锁：订单情况
             *          1没有这个订单，必须解锁
             *          2 有这个订单
             *              订单状态：
             *                  已取消，解锁库存
             *                  没取消，不能解锁库存
             */
            WareOrderTaskDetailEntity byId = orderTaskDetailService.getById(detailId);
            if (byId != null) {
//            解锁
                Long id = to.getId();
                WareOrderTaskEntity taskEntity = orderTaskService.getById(id);
                String orderSn = taskEntity.getOrderSn();
                R r = orderFeignService.getOrderStatus(orderSn);
                if (r.getCode() == 0) {
                    //订单数据返回成功
                    OrderVo data = r.getData(new TypeReference<OrderVo>() {
                    });
                    if (data == null || data.getStatus() == 4) {
                        //订单已经取消了,才能解锁库存
                        if(byId.getLockStatus() == 1){
                            //当前库存工作单状态1 锁定 才能解锁
                            unLockStock(detail.getSkuId(), detail.getWareId(), detail.getSkuNum(), detailId);
                        }
                    }
                }else {
                    throw new RuntimeException("远程服务失败");
            }
        }else {
//                无需解锁
            }
    }
    //防止订单服务卡顿，导致订单状态消息一直改不了，库存优先到期，
    // 查询订单状态新建，什么都不做就走了，导致卡顿的订单，永远不能解锁。
    @Override
    @Transactional
    public void unlockStock(OrderTo orderTo) {
        String orderSn = orderTo.getOrderSn();
        //查询最新库存最新状态。防止重复解锁库存
       WareOrderTaskEntity task =  orderTaskService.getOrderTaskByOrderSn(orderSn);
        Long id = task.getId();
        //按照工作单找到所有没有解锁的库存进行解锁
        List<WareOrderTaskDetailEntity> entities = orderTaskDetailService.list(new QueryWrapper<WareOrderTaskDetailEntity>().eq("task_id", id).eq("lock_status", 1));
        for (WareOrderTaskDetailEntity entity : entities) {
            unLockStock(entity.getSkuId(),entity.getWareId(),entity.getSkuNum(),entity.getId());
        }
    }

    @Data
    class SkuWareHasStock{
        private Long skuId ;
        private Integer num ;
        private List<Long> wareId ;
    }

}